Metal-cutting saw.



P. A. HUNTER.

METAL CUTTING SAW.

APPLICATION FILED 001'. 2-1, 1911.

1,037,146. v Patented Aug. 27, 1912.

IIIIIILIIIIII UNITED FRANK A. Human, or rrrrsaunen, rnmrsnvmm.

METAL-CUTTING saw.

Specification of Letters Patent.

PatentedAu ..27,'i912.

' Appllcationfilednctober 27.191 17- Serial No. 657,047. i

To all whom it may concern:

Be it known that I, FRANK Pittsburgh, in the county of Allegheny and State of Pennsylvania, have invented certainnew and useful Improvements in Metal-Gutting Saws, of which the following is a speci-' fication.

Among the objects of my invention are to provide a new and improved saw havin insertible teeth and particularly designe for sawing metal; to provide a saw in which a greater number of teeth is employed without weakening the blade, to a given diameter ofblade, than has heretofore been possible; a construction in which the insertible teeth are maintained in operative positions in the teeth receiving recesses of the blade by wedges, which latter extend substantially throughout the length of the teeth and project beyond the periphery of the blade; and, further, to provlde a face of each tooth and a face of each wedge with a grippin surface respectively designed to engage t e front and rear walls of the teeth receivin recesses.

In the accompanying drawing,w ich illustrates an application of my invention, Figure 1 is a side elevation of a portion of a metal cutting saw embodying my invention; Fig. 2, a plan of the same; Fig. 3, a henzontal sectional view taken on line III-III of Fig. 1; Fig. 4, a detail vertical sectional view of an insertible tooth and wedge located in a recess of the saw-blade;.Fig. 5, a perspectiveview particularly showing the front and rear faces of a roughing tooth; Fig. 6, a view similar to Fig. 5 showing a finishing tooth; Fig. 7 a perspective view of a wedge; and Fig. 8, a perspective view showing a recess of the blade.

Referring to the drawing, 1 designates the blade or body of the saw aving on its periphery a series of recesses 2. The wallsjof the respective recesses are provided with tongues, ribs or male en aging members, that is to say, the front we 1 of the recess is formed with a member 3, and the rear wall with a member 4. Between the teeth receiving recesses or sockets, I preferably form'the periphery of the saw-blade with cut-out ortions 5 for the purpose of preventing c ogging during the cutting operation.

6 designates a roughing tooth and 7 a finishing tooth. These teeth 6 and 7 are designed to be alternately arranged in the teeth receiving recesses 2, and are each formed on its front face with a groove 8 adapted to re- A. HUNTER, of

v to provide a g PP.

ceive the'tongue or male member 3 when the teeth are placed in the respective recesses 2. Each of sald teeth 6 and T is provided with 'atongue or rib 9 on its rear face, and in ad- -dlt1on to the, groove 8 and the rib 9, the

forward face of each tooth isfcross-planed g surface, as clearly indicated by thenumeral 10. v 11 is a wedge adapted ,tobe'mountediin each recess back 0f-the tooth, and said wedge is formed on its outer" forward face with a.

groove 12 and on its rear face 'W'ithagroove 13 adaptedto respectively receive th'eribor tongue 9 of the'tooth and the'rib. or ton e 4 of the rear wall of the recess. The we ge' 11 is slightly tapered, 'beingi ofzslightly greater width at its outer end than at its inner end, and is of such-a length as to extend almost entirely throughoutthe length of the shank of the tooth and projectfrom the periphery of the blade up along the top or heel of the tooth, thereby affording an efficient support for that portion of the tooth located within the .recess as well as the portion extending beyond the periphery of the blade. In order to provide a gripping effect between the rear wall of the recess 2 and the wedge, the wedge is formed with a gripping surface 14 similar to the surface 10 on the front face of the teeth.

The teeth are adjustably mounted on screws 15 located in the saw-body and having their heads projecting into the rerecesses 2.

The saw illustrated by Fig. 1, represents a saw-blade or body having a fourteen and one-half inch radius with fifty two teeth receiving recesses adapted, of course, to receive fifty-two teeth.

What I claim is:

1. In a metal cutting saw, a blade having a recess formed in its periphery, said recess havin a rib on opposite walls thereof, an adjustmg screw having its shank entered in the blade body, a tooth in the recess mounted on the adjusting screw, said tooth having its front face grooved and its rear face rovided with a rib, and a wedge mounted in the recess back of and engaging the tooth and projecting beyond the periphery of the blade, said wedge being wider at its outer end than at its inner end, and having a groove on its front face to receive a rib of the tooth, and a groove on its rear face to receive a rib of the blade.

2. In a metal cutting saw, a blade having a recess formed in its periphery, said recess having a rib .on opposite walls thereof, an adjusting screw havin its head located in said recess and its I ank entered in the 5 blade, 'a tooth inthe recess mounted on the adjusting screw, said tooth having its front ;face grooved and cross-planed, and its rear 'face provided with a rib, and a wedge mounted in the recess back of and engaging 10 the tooth and rojecting beyond the periphery of the bla e, said wedge being wider at its outer end than at its inner end, and hav ing a-groove on its front face to receive a rib of the tooth, and its rear face crossplaned and formed with agroove to receive a rib of the blade.

In testimon whereof I aflix my signature in presence 0 two witnesses.

\ FRANK A. HUNTER.

Witnesses:

F. E. Garrrmn, W. G. DooLrrrLE. 

